Preparation method of modifier and plastic filler, plastic filler and its application

Abstract

The present invention relates to the technical field of plastic fillers, and discloses a preparation method of a modifier and a plastic filler, as well as the plastic filler and its application. The modifier contains p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine, and the mass ratio is (1-35):1:(0.5-15). The method includes: (1) melting polystyrene and polypropylene respectively to obtain a molten blend of plastic fillers; (2) modifying the molten blend of plastic fillers with the modifier, then hot-pressing and molding, and then making it into a plastic filler tape roll; (3) making scratches with a depth of 1-3 microns on the surface of the plastic filler tape roll. The film-forming ability of the plastic filler of the present invention is improved, the surface wettability is greatly improved, the surface hydrophilic ability is greatly improved, the opportunity and ability of the plastic filler to capture particulate matter are increased, and the heat transfer, dust removal and cooling effects are significantly enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic fillers, and particularly relates to a modifier, a preparation method of a plastic filler, the plastic filler and its application. Background Art

[0002] The desulfurization process refers to fixing the sulfur element in coal by methods such as calcium-based methods to form a solid to prevent SO2 from being generated during combustion. A large amount of dust is generated during the desulfurization process, and the temperature will gradually increase. Both the dust and the high temperature will affect the desulfurization effect, and the dust discharged into the atmosphere will pollute the environment. Therefore, during the desulfurization process, corresponding dust removal and temperature reduction treatments are carried out. At present, the method of adding plastic fillers can be used for dust removal and temperature reduction treatment of the desulfurization process.

[0003] Polystyrene is a polymer synthesized by the free radical polycondensation reaction of styrene monomers. It is a colorless and transparent thermoplastic. Polystyrene has good fluidity, is an amorphous material, has low hygroscopicity and is not easy to decompose, and has a large thermal expansion coefficient. Polypropylene is a semi-crystalline thermoplastic with characteristics such as low hygroscopicity and good fluidity. Since both polystyrene and polypropylene have the characteristic of low hygroscopicity, the surface wettability of the plastic filler prepared from polystyrene and polypropylene is poor, and the hydrophilic ability is poor, resulting in a reduction in the heat transfer ability of the plastic filler, and thus a decrease in its ability to capture particles. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems of poor surface wettability, poor hydrophilic performance, low heat transfer ability, and low particle capture ability of the plastic filler prepared from polystyrene and polypropylene existing in the prior art, and to provide a modifier, a preparation method of a plastic filler, the plastic filler and its application. The modifier provided by the present invention can greatly improve the plastic filler. The film-forming ability of the plastic filler prepared by the method of the present invention is improved, the surface wettability is greatly improved, the surface hydrophilic ability is greatly improved, the opportunity and ability of the plastic filler to capture particulate matter are increased, and the heat transfer, dust removal and temperature reduction effects are significantly enhanced.

[0005] To achieve the above purpose, in the first aspect of the present invention, a modifier is provided. The modifier contains p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine, and the mass ratio of the p-hydroxyphenylacetic acid, the biphenyl polyacyl chloride and the diethylenetriamine is (1 - 35):1:(0.5 - 15).

[0006] Preferably, the biphenyl polyacyl chloride is one or more of 2,2′,4,4′-biphenyltetracarbonyl chloride, 2,2′,5,5′-biphenyltetracarbonyl chloride, 3,3′,5,5′-biphenyltetracarbonyl chloride, 2,3′,4,5′,6,-biphenylpentacarbonyl chloride, and 2,2′,4,4′,6,6′-biphenylhexacarbonyl chloride.

[0007] The second aspect of the present invention provides a method for preparing a plastic filler, the method comprising the following steps:

[0008] (1) Prepare a plastic filler blend: melt polystyrene and polypropylene separately, and then blend the molten polystyrene with the molten polypropylene to obtain a molten blend of plastic filler;

[0009] (2) Modify the molten blend of plastic filler: modify the molten blend of plastic filler with a modifier, then hot press the obtained modified mixture, and then make the obtained molded product into a plastic filler tape roll, wherein the modifier is the modifier described above;

[0010] (3) Surface roughening treatment of the plastic filler tape roll: Scratch the surface of the plastic filler tape roll to a depth of 1-3 microns.

[0011] Preferably, in step (1), the weight ratio of the amount of the molten polystyrene to the amount of the molten polypropylene is 1:(0.5-4).

[0012] Preferably, in step (1), the melting temperature of the polystyrene is 220-250°C.

[0013] Preferably, in step (1), the melting temperature of the polypropylene is 160-175°C.

[0014] Preferably, in step (2), the weight ratio of the amount of the modifier to the amount of the molten blend of plastic filler is 1:(1.5-10).

[0015] Preferably, in step (2), the conditions for modifying the molten blend of plastic filler with a modifier include: temperature of 100-120°C, time of 1.5-3 h.

[0016] Preferably, in step (2), the temperature of the hot pressing is 70-90°C.

[0017] Preferably, in step (3), the device for scratching the surface of the plastic filler tape roll to a depth of 1-3 microns is a high-speed rotating grinding head, and the rotation speed of the grinding head is 140000-150000 r / min.

[0018] Preferably, the feed rate of the high-speed rotating grinding head is 120 - 150 mm / min.

[0019] The third aspect of the present invention provides a plastic filler prepared by the method described above.

[0020] The fourth aspect of the present invention provides an application of the plastic filler prepared by the method described above or the plastic filler described above in the desulfurization process.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] (1) In the present invention, a plastic filler melt blend is prepared from polystyrene and polypropylene, and then a specific modifier is added to modify the plastic filler melt blend. When the modifier is added to the plastic filler melt blend, p-hydroxyphenylacetic acid, biphenyl polyacyl chloride, and diethylenetriamine in the modifier will form a hydrophilic layer on the surface of the plastic filler. Among them, biphenyl polyacyl chloride and diethylenetriamine first undergo an interfacial polymerization crosslinking reaction, and then are connected to p-hydroxyphenylacetic acid through covalent bonds to form a hydrophilic layer; the plastic filler modified by the modifier has greatly improved film-forming ability, and the wettability of its surface is greatly improved. The hydrophilic ability of the plastic filler surface is greatly improved, increasing the opportunity and ability of the plastic filler to capture particulate matter, and significantly enhancing the heat transfer, dust removal, and cooling effects.

[0023] (2) In the present invention, by roughening the plastic filler, scratches with a specific depth are made on the surface of the plastic filler tape roll, which can refine the surface of the plastic filler and increase the surface roughness of the plastic filler, increasing the capillary action of liquid droplet diffusion on the plastic filler surface. During use, the scratches on the plastic filler surface can play a capillary role. Therefore, due to the capillary action of the scratches, the liquid droplets easily spread along the capillary direction, the surface film of the liquid droplets is broken, the spherical shape changes to a thin sheet shape, and the position update of the internal and external liquids is accelerated. All have the opportunity to contact the external gas phase, reducing the heat transfer time in the liquid phase itself, increasing the heat transfer coefficient, also increasing the opportunity and ability of the plastic filler to capture particulate matter, improving the heat transfer ability per unit volume of the plastic filler, and also improving the dust removal effect. Detailed Embodiments

[0024] The following provides a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0025] The endpoints and any values in the ranges disclosed herein are not limited to the exact ranges or values, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, the endpoint values of each range, between the endpoint values of each range and individual point values, and between individual point values can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0026] In the first aspect of the present invention, a modifier is provided. The modifier contains p-hydroxyphenylacetic acid, biphenyl polyacyl chloride, and diethylenetriamine, and the mass ratio of the p-hydroxyphenylacetic acid, the biphenyl polyacyl chloride, and the diethylenetriamine is (1 - 35):1:(0.5 - 15).

[0027] The modifier provided by the present invention can greatly improve the hydrophilic ability of plastic fillers through the combination of specific three substances, improve the opportunity and ability of plastic fillers to capture particulate matter, and significantly enhance the heat transfer, dust removal, and cooling effects.

[0028] In the method of the present invention, the biphenyl polyacyl chloride can be a conventional choice in the art. In a specific embodiment, the biphenyl polyacyl chloride can be one or more of 2,2′,4,4′-biphenyltetracarbonyl chloride, 2,2′,5,5′-biphenyltetracarbonyl chloride, 3,3′,5,5′-biphenyltetracarbonyl chloride, 2,3′,4,5′,6,-biphenylpentacarbonyl chloride, and 2,2′,4,4′,6,6′-biphenylhexacarbonyl chloride.

[0029] The structural formula of the 2,2′,4,4′-biphenyltetracarbonyl chloride is:

[0030]

[0031] The structural formula of the 2,2′,5,5′-biphenyltetracarbonyl chloride is:

[0032]

[0033] The structural formula of the 3,3′,5,5′-biphenyltetracarbonyl chloride is:

[0034]

[0035] The structural formula of the 2,3′,4,5′,6,-biphenylpentacarbonyl chloride is:

[0036]

[0037] The structural formula of the 2,2′,4,4′,6,6′-biphenylhexacarbonyl chloride is:

[0038]

[0039] The first aspect of the present invention provides a method for preparing plastic fillers, and the method comprises the following steps:

[0040] (1) Preparing a plastic filler blend: melting polystyrene and polypropylene respectively, and then blending the molten polystyrene with the molten polypropylene to obtain a molten blend of plastic fillers;

[0041] (2) Modifying the molten blend of plastic fillers: modifying the molten blend of plastic fillers with a modifier, then hot-pressing the obtained modified mixture, and then making the obtained molded product into a plastic filler tape roll, wherein the modifier is a combination of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine;

[0042] (3) Surface roughening treatment of the plastic filler tape roll: scratching the surface of the plastic filler tape roll to a depth of 1-3 micrometers.

[0043] In a specific embodiment, the polystyrene and the polypropylene may be conventional selections in the art and are not particularly limited.

[0044] In the present invention, the melting temperature of the polystyrene and the melting temperature of the polypropylene may be conventional selections in the art.

[0045] In a specific embodiment, the melting temperature of the polystyrene may be 220-250 °C. In a specific embodiment, the melting temperature of the polypropylene may be 160-175 °C.

[0046] In a specific embodiment, the weight ratio of the amount of the molten polystyrene to the amount of the molten polypropylene may be 1:(0.5-4), such as 1:0.5, 1:1, 1:1.5, 1:2, 1:2.5, 1:3, 1:3.5 and 1:4.

[0047] In the method of the present invention, the biphenyl polyacyl chloride may be a conventional selection in the art. In a specific embodiment, the biphenyl polyacyl chloride may be one or more of 2,2′,4,4′-biphenyltetracarbonyl chloride, 2,2′,5,5′-biphenyltetracarbonyl chloride, 3,3′,5,5′-biphenyltetracarbonyl chloride, 2,3′,4,5′,6,-biphenylpentacarbonyl chloride and 2,2′,4,4′,6,6′-biphenylhexacarbonyl chloride.

[0048] In the present invention, the amounts of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine in the modifier have a certain influence on the improvement of the film-forming ability, the improvement of the surface wettability, the improvement of the surface hydrophilic ability, the opportunity and ability of the plastic filler to capture particulate matter, and the enhancement of the heat transfer, dust removal and cooling effects.

[0049] In a preferred embodiment, in step (2), the weight ratio of the amount of the modifier to the plastic filler melt blend may be 1:(1.5 - 10).

[0050] In a preferred embodiment, the mass ratio of the p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine may be (1 - 35):1:(0.5 - 15).

[0051] In a specific embodiment, the process of modifying the plastic filler melt blend with the modifier is as follows: adding the modifier to the plastic filler melt blend for reaction. In a preferred embodiment, the conditions for modifying the plastic filler melt blend with the modifier include: the temperature is 100 - 120 °C and the time is 1.5 - 3 h.

[0052] In the present invention, the device for hot pressing and forming the modified mixture may be a common forming die in the art.

[0053] In a specific embodiment, the temperature of the hot pressing and forming may be 70 - 90 °C.

[0054] In a specific embodiment, during the process of roughening the surface of the plastic filler, a high-speed rotating grinding head may be used to scratch the surface of the plastic filler tape roll with a depth of 1 - 3 microns. The scratches should evenly cover the entire surface of the plastic filler, and the rotation speed of the grinding head is 140,000 - 150,000 r / min.

[0055] In a specific embodiment, the feed rate of the high-speed rotating grinding head may be 120 - 150 mm / min.

[0056] The method of the present invention prepares a plastic filler melt blend from polystyrene and polypropylene, and then adds a specific modifier to modify the plastic filler melt blend. When the modifier is added to the plastic filler melt blend, p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine in the modifier will form a hydrophilic layer on the surface of the plastic filler. Among them, biphenyl polyacyl chloride and diethylenetriamine first carry out an interfacial polymerization cross-linking reaction, and then are connected with p-hydroxyphenylacetic acid through covalent bonds to form a hydrophilic layer; the plastic filler modified by the modifier has greatly improved film-forming ability, and the wettability of its surface has been greatly improved. The hydrophilic ability of the plastic filler surface has been greatly improved, increasing the opportunity and ability of the plastic filler to capture particulate matter, and significantly enhancing the heat transfer, dust removal and cooling effects.

[0057] The method of the present invention mainly prepares a plastic filler melt blend from polystyrene and polypropylene, then adds a modifier to the plastic filler melt blend for modification treatment, and performs hot pressing to form a tape roll. Finally, the surface of the plastic filler is roughened to obtain a plastic filler for dust removal and temperature reduction in the desulfurization process. After the plastic filler is made into a tape roll, the present invention adds a process, namely the roughening treatment process. First, the plastic filler tape roll is driven at a constant speed under the traction of a guide wheel, and then a high-speed rotating grinding head is used to scratch dense scratches with a depth of 1-3 microns on the surface of the plastic filler. The scratches should evenly cover the entire surface of the plastic filler, thereby obtaining a plastic filler with a specially treated surface. By roughening the plastic filler, scratches with a specific depth are made on the surface of the plastic filler tape roll, which can refine the surface of the plastic filler and increase the surface roughness of the plastic filler, increasing the capillary action of liquid droplet diffusion on the surface of the plastic filler. During use, the scratches on the surface of the plastic filler can play a capillary role. Therefore, due to the capillary action of the scratches, the liquid droplets easily spread along the capillary direction, the surface film of the liquid droplets is destroyed, the spherical shape changes to a thin sheet shape, and the position update of the internal and external liquids is accelerated, all having the opportunity to contact the external gas phase, reducing the heat transfer time in the liquid phase itself, increasing the heat transfer coefficient, also increasing the opportunity and ability of the plastic filler to capture particulate matter, improving the heat transfer ability of the plastic filler per unit volume, and also improving the dust removal effect.

[0058] The second aspect of the present invention provides a plastic filler prepared by the method described above. The film-forming ability of this plastic filler is improved, the surface wettability is greatly improved, the surface hydrophilic ability is greatly increased, the opportunity and ability of the plastic filler to capture particulate matter are increased, and the heat transfer, dust removal and temperature reduction effects are significantly enhanced.

[0059] The third aspect of the present invention provides an application of the plastic filler prepared by the method described above or the plastic filler described above in the desulfurization process. Specifically, the plastic filler is used as a dust removal and temperature reduction aid in the desulfurization process.

[0060] The present invention will be described in detail below through examples, but the protection scope of the present invention is not limited thereto. In the following examples, unless otherwise specified, the raw materials used are common commercially available products.

[0061] In the following examples and comparative examples:

[0062] Polystyrene was purchased from Aladdin, general type;

[0063] Polypropylene was purchased from Aladdin, with a melt index of 0.5 g / 10 min;

[0064] Biphenyl polyacyl chloride is 2,2′,5,5′-biphenyltetracarbonyl chloride.

[0065] The following examples are used to illustrate the preparation process of plastic fillers.

[0066] Example 1

[0067] (1) Preparation of plastic filler blend: Melt polystyrene at 240 °C and melt polypropylene at 170 °C simultaneously. Blend the molten polystyrene with the molten polypropylene in a mass ratio of 2.5:3.5 to obtain a molten blend of plastic fillers.

[0068] (2) Modification of the molten plastic filler blend: Add a modifier (mass ratio of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride, and diethylenetriamine is 2.5:1.0:1.0) to the above-prepared molten plastic filler blend in a mass ratio of 2:6.5. React at 110 °C for 2.5 hours to modify the plastic filler. Use a molding die to hot-press the modified mixture. The hot-pressing temperature is 80 °C, and then the molded product is made into a plastic filler tape roll.

[0069] (3) Surface roughening treatment of the plastic filler tape roll: Use a high-speed rotating grinding head with a rotational speed of 150000 r / min to draw dense scratches with a depth of 2 microns on the surface of the plastic filler tape roll at a feed rate of 120 mm / min. The scratches should evenly cover the entire surface of the plastic filler to obtain a plastic filler with a specially treated surface.

[0070] Example 2

[0071] (1) Preparation of plastic filler blend: Melt polystyrene at 235 °C and melt polypropylene at 170 °C simultaneously. Blend the molten polystyrene with the molten polypropylene in a mass ratio of 3:4 to obtain a molten blend of plastic fillers.

[0072] (2) Modification of the molten plastic filler blend: Add a modifier (mass ratio of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride, and diethylenetriamine is 2.0:1.5:1.5) to the above-prepared molten plastic filler blend in a mass ratio of 1.5:8. React at 100 °C for 1.5 hours to modify the plastic filler. Use a molding die to hot-press the modified mixture. The hot-pressing temperature is 75 °C, and then the molded product is made into a plastic filler tape roll.

[0073] (3) Surface roughening treatment of the plastic filler tape roll: Use a high-speed rotating grinding head with a rotational speed of 150000 r / min to draw dense scratches with a depth of 2 microns on the surface of the plastic filler at a feed rate of 130 mm / min. The scratches should evenly cover the entire surface of the plastic filler to obtain a plastic filler with a specially treated surface.

[0074] Example 3

[0075] (1) Prepare a plastic filler blend: Melt polystyrene at a temperature of 245 °C, and at the same time melt polypropylene at a temperature of 175 °C. Blend the molten polystyrene and the molten polypropylene in a mass ratio of 1.5:2.5 to obtain a molten plastic filler blend.

[0076] (2) Modify the molten plastic filler blend: Add a modifier (the mass ratio of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine is 3.5:0.1:1.5) to the molten plastic filler blend prepared above in a mass ratio of 3.5:7.5 of the modifier to the molten plastic filler blend, and react at 120 °C for 2.5 hours to modify the plastic filler. Use a molding die to hot-press the modified mixture. The hot-pressing temperature is 85 °C, and then the molded product is made into a plastic filler tape roll.

[0077] (3) Surface roughening treatment of the plastic filler tape roll: Use a high-speed rotating grinding head with a rotational speed of 145000 r / min to scratch dense scratches with a depth of 2 μm on the surface of the plastic filler tape roll at a feed rate of 150 mm / min. The scratches should evenly cover the entire surface of the plastic filler to obtain a plastic filler with a specially treated surface.

[0078] Example 4

[0079] (1) Prepare a plastic filler blend: Melt polystyrene at a temperature of 230 °C, and at the same time melt polypropylene at a temperature of 160 °C. Blend the molten polystyrene and the molten polypropylene in a mass ratio of 1:2 to obtain a molten plastic filler blend.

[0080] (2) Modify the molten plastic filler blend: Add a modifier (the mass ratio of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine is 3.0:1.0:1.0) to the molten plastic filler blend prepared above in a mass ratio of 4:7 of the modifier to the molten plastic filler blend, and react at 120 °C for 3 hours to modify the plastic filler. Use a molding die to hot-press the modified mixture. The hot-pressing temperature is 75 °C, and then the molded product is made into a plastic filler tape roll.

[0081] (3) Surface roughening treatment of the plastic filler tape roll: Use a high-speed rotating grinding head with a rotational speed of 150000 r / min to scratch dense scratches with a depth of 3 μm on the surface of the plastic filler tape roll at a feed rate of 145 mm / min. The scratches should evenly cover the entire surface of the plastic filler to obtain a plastic filler with a specially treated surface.

[0082] Example 5

[0083] (1) Preparation of plastic filler blend: Melt polystyrene at a temperature of 245 °C, and at the same time melt polypropylene at a temperature of 165 °C. Blend the polystyrene melt and the polypropylene melt in a mass ratio of 2.5:3.5 to obtain a plastic filler melt blend;

[0084] (2) Modification of plastic filler melt blend: Add a modifier (the mass ratio of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine is 1.5:0.8:0.5) to the above-prepared plastic filler melt blend in a mass ratio of the modifier to the plastic filler melt blend of 3:9.5, react at 115 °C for 2 hours to modify the plastic filler, and use a molding die to perform hot pressing on the modified mixture. The hot pressing temperature is 80 °C, and then the molded product is made into a plastic filler tape roll;

[0085] (3) Surface roughening treatment of plastic filler tape roll: Use a high-speed rotating grinding head with a rotational speed of 140000 r / min to draw dense scratches with a depth of 1.5 microns on the surface of the plastic filler tape roll at a feed rate of 135 mm / min. The scratches should evenly cover the entire surface of the plastic filler to obtain a plastic filler with a specially treated surface.

[0086] Example 6

[0087] (1) Preparation of plastic filler blend: Melt polystyrene at a temperature of 250 °C, and at the same time melt polypropylene at a temperature of 170 °C. Blend the polystyrene melt and the polypropylene melt in a mass ratio of 3:2.5 to obtain a plastic filler melt blend;

[0088] (2) Modification of plastic filler melt blend: Add a modifier (the mass ratio of p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine is 1.5:0.9:0.6) to the above-prepared plastic filler melt blend in a mass ratio of the modifier to the plastic filler melt blend of 1.5:7.5, react at 110 °C for 2 hours to modify the plastic filler, and use a molding die to perform hot pressing on the modified mixture. The hot pressing temperature is 80 °C, and then the molded product is made into a plastic filler tape roll;

[0089] (3) Surface roughening treatment of plastic filler tape roll: Use a high-speed rotating grinding head with a rotational speed of 140000 r / min to draw dense scratches with a depth of 1 micron on the surface of the plastic filler tape roll at a feed rate of 120 mm / min. The scratches should evenly cover the entire surface of the plastic filler to obtain a plastic filler with a specially treated surface.

[0090] Comparative Example 1

[0091] Prepare the plastic filler according to the steps in Example 1, except that during the preparation, the roughening treatment is not carried out and the modifier is not added to modify the plastic filler melt blend, that is, steps (2) and (3) are not carried out.

[0092] Dust removal and temperature reduction comparison test in the test example

[0093] Add the plastic fillers prepared in the examples and comparative examples to the desulfurization tower of the wet desulfurization process, and measure the dust content and temperature difference change before and after the addition of the plastic filler according to the conventional process. The results are shown in Tables 1 and 2.

[0094] Dust removal rate = (dust content before adding plastic filler - dust content after adding plastic filler) / dust content before adding plastic filler x 100%;

[0095] Temperature change rate = (temperature before adding plastic filler - temperature after adding plastic filler) / temperature before adding plastic filler x 100%.

[0096] Table 1

[0097]

[0098]

[0099] Table 2

[0100]

[0101] It can be seen from the test results in Tables 1 and 2 that the plastic filler prepared by the method of the present invention reduces the dust content in the desulfurization process, reduces the temperature in the desulfurization process, and significantly enhances the heat transfer, dust removal and temperature reduction effects, and can be widely applied to the desulfurization process.

[0102] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the technical concept scope of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A modifier, characterized in that, The modifier contains p-hydroxyphenylacetic acid, biphenyl polyacyl chloride and diethylenetriamine, and the mass ratio of the p-hydroxyphenylacetic acid, the biphenyl polyacyl chloride and the diethylenetriamine is (1-35):1:(0.5-15).

2. The modifier according to claim 1, wherein The biphenyl polyacyl chloride is one or more of 2,2′,4,4′-biphenyltetracarbonyl chloride, 2,2′,5,5′-biphenyltetracarbonyl chloride, 3,3′,5,5′-biphenyltetracarbonyl chloride, 2,3′,4,5′,6,-biphenylpentacarbonyl chloride and 2,2′,4,4′,6,6′-biphenylhexacarbonyl chloride.

3. A preparation method of a plastic filler, characterized in that, This method comprises the following steps: (1) Prepare a plastic filler blend: Melt polystyrene and polypropylene respectively, and then blend the molten polystyrene with the molten polypropylene to obtain a molten plastic filler blend; (2) Modify the molten plastic filler blend: Modify the molten plastic filler blend with the modifier, then perform hot pressing on the obtained modified mixture, and then make the obtained molded product into a plastic filler tape roll, wherein the modifier is the modifier described in claim 1 or 2; (3) Surface roughening treatment of the plastic filler tape roll: Scratch the surface of the plastic filler tape roll to a depth of 1-3 microns.

4. The method according to claim 3, wherein In step (1), the weight ratio of the amount of the molten polystyrene to the amount of the molten polypropylene is 1:(0.5-4).

5. The method according to claim 3, wherein In step (1), the melting temperature of the polystyrene is 220-250 °C.

6. The method according to claim 5, characterized in that, In step (1), the melting temperature of the polypropylene is 160-175 °C.

7. The method according to any one of claims 3-6, characterized in that In step (2), the weight ratio of the amount of the modifier to the amount of the molten plastic filler blend is 1:(1.5-10).

8. The method according to any one of claims 3-6, characterized in that, In step (2), the conditions for modifying the molten plastic filler blend with the modifier include: the temperature is 100-120 °C and the time is 1.5-3 h.

9. The method according to any one of claims 3-6, characterized in that, In step (2), the temperature of the hot pressing is 70-90 °C.

10. The method according to any one of claims 3-6, characterized in that, In step (3), the device for scratching the surface of the plastic filler tape roll to a depth of 1-3 microns is a high-speed rotating grinding head, and the rotation speed of the grinding head is 140000-150000 r / min; and / or The feed rate of the high-speed rotating grinding head is 120-150 mm / min.

11. A plastic filler prepared by the method according to any one of claims 3-10.

12. The application of the plastic filler prepared by the method according to any one of claims 3-10 or the plastic filler according to claim 11 in a desulfurization process.

Images